Abstract
The paper presents a novel hybrid configuration to obtain dual band operation at millimeter wave frequency in W band (75 GHz to 110 GHz). Dual band operation is achieved by introducing a slot in the main patch, which is coupled to the parasitic patches along non-radiating edges through gap coupling. The antenna resonates at two frequencies, viz., 85 GHz and 94 GHz with fractional bandwidths of 8% and 1.8%, respectively. The simulated gains at two frequencies are 8.28 dB and 8.89 dB, respectively. A scaled prototype of the proposed dual band millimeter wave antenna has been fabricated. Comparison of measured and simulated results has been done in terms of return loss and far field measurements.
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